<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <ul>
      <li v-for="item in list" :key="item.id">{{item.name}}</li>
    </ul>
    <button @click="btn">走一走</button>
  </div>
  <script src="./js/vue-2.7.14.js"></script>
  <script>
    new Vue({
      el: '#app',
      data: {
        list: [
          { id: 1, name: '帅哥' },
          { id: 2, name: '美女' },
          { id: 3, name: '程序猿' },
        ]
      },
      methods: {
        btn() {
          // 删除数组第一个元素,并添加到最后一项
          this.list.push(this.list.shift())
        }
      }
    })
  </script>
</body>

</html>